Teenaged

Sami was born to teenaged parents.

a teenaged girl

Dexter's vocals are competent enough: his timbre is thin and eternally teenaged, but he can go apeshit on the hiccupy histrionics like no one's business.

In one photograph, a teenaged Leah crouches by a tall cylindrical tank containing what she identified to me as a giant Pacific octopus named Pamela. We were pals, she said, in a voice that I thought seemed to strive for offhandedness, did you know they taste with their skin? Octopuses, I mean.